public class Node { int data; Node left, right; public Node(int item) { data = item; left = right = null; } public String toString() { return Integer.toString(data); } }
public class Node { int data; Node next; public Node(int item) { data = item; next = null; } public String toString() { return Integer.toString(data); } }In this example, Node class represents a node in a singly linked list. The toString() method returns a string representation of the node's data value. Both of these examples do not rely on any external library or package. Therefore, we do not need to determine any package library.